Control system for transmissions



"Dec. 31, 1935; RR. Wl -I EELER 2,026,152

CONTROL SYSTEM FOR TRANSMISSIONS Filed March 17, 1952 4 Sheets-Sheet 1 l'P.]R. WHEELER 2,026,152 CONTROL SYSTEM FOR TRANSMISSIONS 1 iFil edMarch 17; 1932 v 4 Shets-Sheet 2 Rear P. R.. WHEELER 2,026,152 j CONTROLsYsTEMFoR TRANSMISSIONS Dec. 31, 1935.

Filed March 11 1952 4 snets-sneez 3* mag/M 1, 1935- P. R. WHEELER 2 52"cpNTRoL SYSTEM FOR TRANSMISSIONS Filed March 17,1932 4 Sheets-Shet =4as a centerand a radius equal'tothe distance be,-

. tiplied several Operation The shaft I normally turns counterclockwise,-

as viewed in Figure I. The ring 2 turns inside the clamp ring 4, thelatter relieving so that the shearing of the oil illm beneath it is theonly resistance offered to the turning of the'shaft and the ring. Theslight friction between the clamp ring and the inner ring or sleevekeeps the end of I the lever 8 pushed. against the rod [1. This tendsto. spreadthe clamp ring so that it is always loose when the shaft turnscounter clockwise If the car is stopped on an up grade and tends toslide backwards, the roller. at the end, of th lever exerts a pressureon the surface 22 and locks the clamp ring upon the ring 2. Thisnormally locks without any relative movement between the clamp ring andthe shaft. When the shaft is stopped the oil film is kept squeezed fromlever and partly by thelocation of the pins I and 8, The pin 8 is alittle behind 'I,"; so ,that it'tends to ride up on the circle are drawnwith C tween the centers 1 and 8. This "causes aninward pressure on Iandan outward pressure'on 8. The clamping action of the lever is thusmm- 7 times, depending upon the smallnessfof the angle; The cotangent ofthefangle BCE gives the amount'of the increase in clamping action.

when going inte reverse, the low and reverse Shifter rod, l8 hits theend of the rod l'l,rmoving this and the cam 21 ioftl e left. 'Ihe'cam 2|lifts the arm ilso that s crooked end clears the roller i2, allowingtheiever and clampjri'ng to move in a clockwise direction.' After aslight movement,'the roller comes incontact with the .release' bar 26andfliscarried outward as shown by the relationof the circle are drawnwith radi us G and the upper side of the release bar. This outwardmovement or the. lever end causes the clamp ring to, be spread open sothat it releases and allows'a'free clockwise rotation of the shaft.

Theroller [2 stops underthe hook end of the stop arm l3, holding it inits raisedpositio'n after the shift from reverse ,to neutral has beenmade, and the rod I1 and cam 2| have been returned to the positionshown. As soon as the shaft l makes a slight forward movement, counterclockwise, the rollerl2 is carried from under the; end of. the hook, thearm i3 drops down andthe hook again engages theroller. j I

Referring to-Figure IIIQthe end of a low and reverse shifter rod is"shown'at- 39. This has an end 3|" of'reduced size which fits slidablyinto the hollow rod 32. The rodtf'carries the cam 33, which is eithermade integralor-securely fastened to it. The arm 34, shown in section,cor

respondsto'the arm l3'in Figure 1. The rod 35 has an end of reduced sizewhich fits slidably into the rod 32. The yoke or fork 31 (partiallyshown) for operating the free-wheeling lock-out is securely fastened tothe rod 35. Another fork, 38, fits over 35 so as to havea bearing on theend 0131. The fork 38 isattached to a rod go ingthroughthehousing andhaving an arm 38 both are again effective.

connected to a free-wheeling lock-out control. The spring 4| serves toreturn the rod 35 and yoke 31. A part of the housing 42 slidablysupports the end of the rod 35 and serves as an abutment for the end ofthe spring 4i. Another 5 igation of the housing, 43, slidably supportsthe r 2. I

In Figures In and IV, neither the gear transmission, the free-wheelingunit nor the no-back unit issshown, except as regards: their relativepositions and relations to the controls. Gear transmissions andfree-wheeling units are well known to the art and the type of no-backrepresented by the control is shown in Figures I and II." It is feltthat a further detailing of the elements would only encumber theapplication, and accordingly, for the sake of clearness and conciseness,such detailing is omitted.

Operation of Figure III: The control elements, in the position shown,represent a neutral posi- 20 tion of the low and reverse shifter rod,30, a noback position for 33 and '34, and a free-wheeling position for35- and- 31. when shifting intolow, therod 30 would slide ahead withoutdisturbing the other. elements. when in: second or high, 25 the rod 30-would be returned to the position shown. Thus free-wheelingand'no-backwould be'eifective in neutral and in all forward speeds.

when shifting to reverse, the rod 30 would move to the left, carryingthe other elements 30 with it. The cam 33 would push up the arm 34,releasing the no-back and the yoke 31' would lock-out the free-wheelingunit.

l Thus-when shifting from reverse back to neutral, the spring ll returnsthe free-wheeling and 35 no back controls to the position shown so thatIf at any time it is desired 'not to use either the free-wheeling orno-back units, these may be locked out with separate lockout controlsnow used, such as levers, 4Q buttons on the dash, or foot controls. Aportionof a connection leadingto the free-wheelingzlock-out control is:shownat 40. When a pull is exerted on this connection, 35 and 31will-be carried to the left, locking out the free- 45 wheeling unit.This may then be left locked out until it is desired touse'it again.

/ The no-back is not affected by the free-wheeling lock-out control, butremains effective unless in reverse gear or locked out by the sepa- 5rate lock-outcontrol, This lock-out control may be of any of the typesmentioned above for the free-wheeling unit or'may be of the type shownin Figure V, this being mounted as shown above Figure III, either on'thefloor or a por- 55 tion of the front seat support. This control connectsas shown at 23 in Figure I.

Thus both units may be eflective at all times except in reverse, whenthe gear shift lever locks them-out; or either one or both may be sepasorately locked out. The no-back unit would normally be usedat all timesexcept when it is desired to push the car by hand as in a garage, whileit isbeing repaired. I i

-In Figure IV, is shown-a modified system ofcfi control in which thefree-wheeling lock-out control locks out both units. Otherwise, all ofthe parts correspond to those of Figure III and operate the same. Thechief difference is that the rods 32 and 35 are combined into the singlerod 45. However, a separate no-backlook-out may housed the same as inFigure 111. This would make it possible to loci: out the no-back andhave free-wheeling, but, if the free-wheeling is locked out the no-backalso would be locked out. 76

,Referring to XVIII, thefnumerals I30,

I8 I, and I32 designate the same parts as in Figure' XVII. The lever I45is connected by means of. the pinlfli ,to the rod 1. Thisenters thecylinder I18. f The spring I49 is held by the pro,- jectionISIIandsecured atthe other end at I5I'.. This-errertsi a pull onthe. levertending to pull it towards thecyl'inder. The cylinderis held by means ofthe pin I52. A circular housing I53 is threaded mm the main housing I54,and held with the lock nut I55.f A spring I56 exerts a pull Hontheelever I45, keeping a small amount of initial tension on the clampring. ,V

In Figure'XIX is shownan enlargedsection of the cylinder I48. The rodM'lhas a stop nut I59 and a piston I60. The piston has the holes I6Idrilled through it. They are covered by the annularvalve I62 which iskept in place by the spring I63: A stop I64 is pressedtightly into thebottom of "the, cylinder. 'Ihis holds'the spring I65 which presses theinlet valve I66 which covers I68 has a' small amount of the port I61.The cap 1 clearance I69. The rod I 41 is slightly larger at II II sothat the clearance is reduced as the stop nut nears the cap.

, The hydraulic. unitdescribed is designed toofl 'er resistancetopullrather than to push,

as is the unit of Figure XVII. In operation, the piston normally keepsthe position shown in Figure XIX. When the n'o-back takes'hold thepiston will be pulledto theright, forcing the trapped oil out throughthe clearance space I69. More oil will'be sucked in below the pistonthrough the port IBI.v When the. piston returns theoil below it willpass through the hole GI to the upper side, thus making the Itflisdesirable that both of the above described f ts should be at leastpartially immersed inoil at all times.

I claim: t p

1. In a no-back device for use in combination with transmissions, aclamp ring surrounding a part having connection with the rear wheels,said clamp" ring consisting of a circular ring having a projection onone side, the said projection having two holes for connection to a leverthe two holes being substantially in line'with' a diameter of the, clampring circle, a lever connected by means of the said holes, and a out:between the two holes, severing the said ring, and means to engagetheiend of the lever to prevent backward m vem a 2. Claim 1 and one ofsaid holes being one. linedrawn through the center of the clamp ringcircle and the other of said holes being slightly displaced from thesaid line. a i

3. A shaft, a clamp ring surrounding the shaft, a lever having two linesof connection with the clampring', aroller'secured to the end of thelever, means for engaging the roller to prevent the backward movement ofthe clamp ring, means for releasing the roller'to allow abackwardmovement,- a second means for engaging the roller, this second saidmeanscausing the clampring totrelease. a I t I 1 4. In a no-backdevice,a'shaft, a clamp ring surrounding the'shaft, a leverhaving two linesofyconnection with the clamp ring, means for unit again ready foroperation.

engaging the end of the lever to prevent backward movement of theclampring, means for releasing the end of the lever to permit a backwardmovement, and means-engaging a portion .of the lever, said means causingthe clamp ring to re- 5 lease.

5. Inea no-back device. ashaft, a clamp ring surrounding the shaft, alever havingtwov lines of connection with the clamp rin'gz'jme'ans forengaging the end of the lever to prevent backward movement or the clampring, means for releasing the end of the lever to. permit vbackwardmovement and means engaging the inside connection between the lever andthe clamp ring, said means causing the clamp ring to release,

6. In ano-back device, a shaft, a clamp ring surrounding the shaft, alever having two lines of connection with the clamp ring, meansforengaging'the end'of the lever'to prevent backward movement of the clampring, means for releasing the end of thelever to permit backwardmovement, and means engaging a portion of the clamp ring to cause itsrelease.

7. In a no-back device, a clamp ring, a lever connected to the clampring, means for holding my the end of the lever, and means for releasingthe said endof the lever, the said releasing means permitting a slightbackward movement of the lever end.'

8. ma no-back device, an inner c'irchlarmem- 3o ber, an outer clamp ringmember, a lever arm for the clamp ring, means releaseably engaging theend of the lever arm and means causing the clamp ring to release whenthe lever arm end is released.

9. In a no-back device, an inner circular'mem bar, a clamp ring fittingover the circular member,

a lever arm connected to the ends of the clamp ring, means for holdingthe end of the lever arm, a means to cause the first named means torelease theend of the lever arm and means causing the clamp ring torelease when the lever arm and has been released.

v 10. Inia no-back device, a shaft member having parallel sides, a clampring fitting over the shaft member, a lever arm for the clamp ring,means for holding the end. of the lever arm, means for releasing the endof the lever and other means acting to prevent reverse rotation of theclamp. ring but pemitting reverse rotation of the shaft. 1 a g 11. In ano-back device, a shaft, a one way clutch element surrounding the shaft,a stop for engaging a portion of the clutch element to prevent reverserotation thereof, means for pivotly connecting the stop to a stationarypart, means for rotating the stop to cause the release of the clutchelement, the engaging surface of the said stopwhich holds the clutchelement being a circle are about the pivot axis of the said stop.

12. In a no-back device, a one way clutch having an inner and an outermember, astop member for engaging one of the members, a pivot connectionfor securing the stop member to a stationary part, a part on the stopmember which is a circle arc about the said pivot connection, this saidcircle are part engaging a part on the nonrotating clutch part, andmeans for causing the stop'arm to release the said clutch part.

13. In a no-back device, a one way clutch having a rotary member and anormally stationary 70 member a stop for engaging a portion of thenon-rotating member to secure it against rotation, a pin securingthcstop to a stationary part andmeans for rotating the stop to cause it torelease the non-rotating part which it normally holds, and other meansthen acting to permit reverse rotation of the rotating part.

14. In a no-back device, a one way clutch having a rotary part and anormally stationary part, a stop arm for engaging andholding thestationary part, a roller acting between the stop arm and the engagedpart of the said clutch and means for causing the stop arm to releasethe said clutch part, and other means then acting to permit reverserotation of the rotary part,

15. In a no-back device, aone way clutch of the clamp ring type, a leverarm for the clamp ring, a stop for engaging the end of' the lever arm,meansfor causing the stop to release the end of the lever arm and a Umember acting to hold the clamp ring after the release of the lever endby the stop, the said U member releasing the clamp ring so as to permitreverse rotation of the rotat-" ing member.

16. In a no-baok device, a shaft member, a clamp ring, a lever arm forthe clamp ring, resilient means acting between the lever arm and theclamp ring to producean initial tension on the ring and means of thelever arm. n

17. In a non-back device, a shaft member, a clamp ring, a lever for theclamp ring, spring means for causing an initial clamping actionof theclamp ring on the said shaft member, means for holding the end of thesaid lever, means for releasing the end of the lever, and means actingto permit reverse movement after the end of the lever has been released.p

18. In a no-back device, a clamp ring, a lever connected to the ends ofthe clamp ring, a stop for holding the lever end, means for releasingthe lever end, and means to, maintain the lever end releasably holdingthe end 1 released. a

19. In a no-back device, a clamp ring, a lever for the clamp ring, astop for holding the end of for the clamp ring, pin lever and the endsof the clamp ring, these con- 5 the lever, and cam means for causing thestop to' release the end of the lever.

20. In a no-back device, a clamp ring, a lever connections between thenections being substantially in line with a diameter of the clamp ringcircle, a roller on the end of the said lever, a stop for engaging theroller, a pinconnecting the stop to a stationary part, a surface on thestop for engaging the said roller, the said surface being a circle areabout the said pin connection to the'stationary part, means for causingmovement of the stop to release the roller, and other means then holdingthe inside end of the clamp ring. I 21. In a no-back device, -a shaftmember, a clamp ring member, an engaging surface between these twomembers, the said engaging surface being cylindrical in form andparallel to the shaft axis, a lever arm for the said clamp ring, meansreleasably engaging the end of the said lever, and other means acting tohold the clamp ring and to cause it to release the said' shaft member inreverse directi n when the said lever end is released.

' 22. In a one way brake mechanism, a rotatable member, a one way brakemember associated with the said rotatable member, the said one way brakemember permitting forward rotation of the rotatable member but normallypreventing reverse rotation, a roller secured, to a part of the said oneway brake member, a stop member, the said roller transmitting torquefrom the said brake member to the said stop member when the saidrotatable member tends to turn in the reverse direction, means to movethe said stop member to release 1 the roller, and other means acting torelease the one way brake member to permit reverse rotation of therotatable member; n PHILLIP R. WHEELER. 40

